Since introduced of 90 years, it has become a mature technology with lower prices.Access network in the application of SDH technology, will be the core technology in the SDH network bandwidth advantage of the tremendous technological advantages and access network into the area to make full use of SDH synchronous reuse, standardization of optical interfaces, a powerful network management capabilities, flexible network topology And the ability to bring the benefits of high-reliability, in the access network construction and development of medium and long-term benefit.
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